NGK

NGK — The World's #1 Spark Plug Brand

NGK has been manufacturing spark plugs and ignition components since 1936, earning the position of the world's most widely used spark plug brand through consistent quality, precise application engineering, and a product lineup that covers virtually every gasoline and diesel engine on the road. From standard copper plugs to laser iridium performance units, NGK produces spark plugs for OEM factory fill, replacement service, and high-performance applications — with the same engineering rigor applied to every tier of the product lineup.

Copper Spark Plugs

NGK's copper core spark plugs are the baseline of the lineup, providing reliable ignition performance for standard replacement applications across a wide range of domestic and import engines. Copper core construction provides excellent thermal conductivity for consistent heat range performance, with NGK's corrugated ribs and triple gasket seal preventing flashover and ensuring a leak-free installation. Copper plugs are the correct choice for older engines with conventional ignition systems and for applications where plug replacement is performed at standard service intervals.

Platinum & Double Platinum Spark Plugs

NGK platinum spark plugs extend service life beyond copper plugs through a platinum firing tip that resists electrode wear at the higher temperatures generated by modern engine management systems. Double platinum designs place platinum on both the center and ground electrodes, providing consistent gap maintenance over extended service intervals on waste-spark ignition systems where both electrodes experience equal wear. Platinum plugs are the correct OEM-specification replacement for most modern domestic and import vehicles with extended tune-up intervals.

Iridium & Laser Iridium Spark Plugs

NGK's iridium spark plug lineup represents the highest tier of the product range, with iridium firing tips that provide the longest service life and most consistent spark performance of any plug construction. The fine-wire iridium center electrode requires less voltage to fire than a conventional electrode, reducing ignition system load and improving spark reliability at high RPM and under boost. Laser Iridium plugs use a laser-welded iridium tip on both the center and ground electrodes for maximum durability and consistent gap maintenance over 100,000-mile service intervals on supported applications.

For performance and forced induction applications, NGK's iridium plugs provide the spark reliability needed at elevated cylinder pressures where conventional plugs misfire. The reduced firing voltage requirement of the fine-wire iridium electrode is particularly beneficial in turbocharged and supercharged engines where cylinder pressure at ignition timing is significantly higher than a naturally aspirated equivalent.

Racing Spark Plugs

NGK produces a dedicated racing spark plug lineup for competition applications where standard plugs are insufficient for the heat range, electrode configuration, or firing voltage requirements of the engine. Racing plugs are available in a wide range of heat ranges to match the specific thermal load of different engine combinations, fuel types, and boost levels. Correct heat range selection is critical in race applications — a plug that is too cold will foul, while a plug that is too hot risks pre-ignition and engine damage.

Oxygen Sensors

NGK produces OEM-quality oxygen sensors and air/fuel ratio sensors for a wide range of domestic and import vehicles. Wideband and narrowband sensor options cover both pre-cat and post-cat sensor positions, with direct-fit connectors and correct thread pitch for each supported application. NGK oxygen sensors meet or exceed OEM specifications for response time, accuracy, and service life — ensuring correct fuel trim operation and emissions system function after replacement.

Common Applications

NGK spark plugs and sensors cover virtually every domestic and import vehicle platform — including GM, Ford, Chrysler/Mopar, Toyota, Honda, Subaru, Nissan, BMW, Mercedes-Benz, Volkswagen, and Audi applications across all engine types and model years. NGK's application database is the most comprehensive in the spark plug industry, with OEM-specification plugs for current-model-year vehicles and replacement plugs for vintage and classic applications.

Installation Notes

NGK spark plugs are pre-gapped to the OEM specification for most applications — verify the gap against the vehicle specification before installation and adjust carefully if needed, as iridium and platinum fine-wire electrodes are more fragile than copper electrodes and can be damaged by aggressive gapping. Apply anti-seize to plug threads only if specified by the vehicle manufacturer — NGK plugs have a nickel-plated shell that provides adequate corrosion resistance without anti-seize on m...

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  • NGKBR9ECS.jpg
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    NGK
    NGK Spark Plug Stock # 4677
    $9.99 USD
    $9.99 USD
    $9.99 USD
    Spark Plug - NGK Standard - 14 mm Thread - 0.749 in Reach - Gasket Seat - Stock Number 4677 - Resistor - Each
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    NGK
    NGK Spark Plug Stock # 2120 (ATV & Motorcycle)
    $3.99 USD
    $3.99 USD
    $3.99 USD
    Spark Plug - NGK Standard - 12 mm Thread - 0.749 in Reach - Gasket Seat - Stock Number 2120 - Non-Resistor - Each
  • NGKIZFR7M.jpg
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    NGK Spark Plug Stock # 4214
    $16.99 USD
    $16.99 USD
    $16.99 USD
    Spark Plug - NGK Laser Iridium - 14 mm Thread - 0.749 in Reach - Gasket Seat - Stock Number 4214 - Resistor - Each
  • NGKBKR7E-11.jpg
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    NGK
    NGK Spark Plug Stock # 5791
    $3.99 USD
    $3.99 USD
    $3.99 USD
    Spark Plug - NGK V-Power - 14 mm Thread - 0.749 in Reach - Gasket Seat - Stock Number 5791 - Resistor - Each
  • NGK Spark Plug Stock # 7773 UR6
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    NGK Spark Plug Stock # 7773 UR6
    $3.69 USD
    $3.69 USD
    $3.69 USD
    NGK Spark Plug Stock # 7773 UR6 is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This list...
  • NGK MOD Ignition Coil Set 8pk Stock #49472 M5132-8
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    NGK MOD Ignition Coil Set 8pk Stock #49472 M5132-8
    $487.99 USD
    $487.99 USD
    $487.99 USD
    NGK MOD Ignition Coil Set 8pk Stock #49472 M5132-8 is a NGK ignition coils built to support strong spark output, reliable ignition performance, and clean engine operation. This listing is built for...
  • NGK Spark Plug Stock # 2262 ZFR5F-11
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    NGK Spark Plug Stock # 2262 ZFR5F-11
    $3.19 USD
    $3.19 USD
    $3.19 USD
    NGK Spark Plug Stock # 2262 ZFR5F-11 is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This...
  • NGK Ignition Coil Stock # 48695 U2057
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    NGK
    NGK Ignition Coil Stock # 48695 U2057
    $67.99 USD
    $67.99 USD
    $67.99 USD
    NGK Ignition Coil Stock # 48695 U2057 is a NGK ignition coils built to support strong spark output, reliable ignition performance, and clean engine operation. This listing is built for buyers who n...
  • NGK Racing Spark Plug Stock #95811 R7448A-10
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    NGK Racing Spark Plug Stock #95811 R7448A-10
    $15.99 USD
    $15.99 USD
    $15.99 USD
    NGK Racing Spark Plug Stock #95811 R7448A-10 is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applicatio...
  • NGK Spark Plug Stock # 7348 UR6IX
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    NGK
    NGK Spark Plug Stock # 7348 UR6IX
    $10.99 USD
    $10.99 USD
    $10.99 USD
    NGK Spark Plug Stock # 7348 UR6IX is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This li...
  • NGK COP Ignition Coil Stock # 48845 U5112
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    NGK
    NGK COP Ignition Coil Stock # 48845 U5112
    $49.99 USD
    $49.99 USD
    $49.99 USD
    NGK COP Ignition Coil Stock # 48845 U5112 is a NGK ignition coils built to support strong spark output, reliable ignition performance, and clean engine operation. This listing is built for buyers w...
  • NGK Spark Plug Stock # 7913 SILFR6A
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    NGK Spark Plug Stock # 7913 SILFR6A
    $14.99 USD
    $14.99 USD
    $14.99 USD
    NGK Spark Plug Stock # 7913 SILFR6A is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This ...
  • NGK Racing Plug # 4074 R6061-9
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    NGK
    NGK Racing Plug # 4074 R6061-9
    $10.99 USD
    $10.99 USD
    $10.99 USD
    NGK Racing Plug # 4074 R6061-9 is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This listi...
  • NGK COP Ignition Coil Stock # 48726 U5076
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    NGK
    NGK COP Ignition Coil Stock # 48726 U5076
    $55.99 USD
    $55.99 USD
    $55.99 USD
    NGK COP Ignition Coil Stock # 48726 U5076 is a NGK ignition coils built to support strong spark output, reliable ignition performance, and clean engine operation. This listing is built for buyers w...
  • NGK Spark Plug Stock # 5266 IZFR6K-11S
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    NGK
    NGK Spark Plug Stock # 5266 IZFR6K-11S
    $14.49 USD
    $14.49 USD
    $14.49 USD
    NGK Spark Plug Stock # 5266 IZFR6K-11S is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. Th...
  • NGK Spark Plug Stock # 91784 LKAR8BHX
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    NGK
    NGK Spark Plug Stock # 91784 LKAR8BHX
    $15.49 USD
    $15.49 USD
    $15.49 USD
    NGK Spark Plug Stock # 91784 LKAR8BHX is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. Thi...

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